High efficiency off-line linear power supply
US7952300B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2008 |
| Grant date | May 31, 2011 |
| Priority date | — |
| Expiry date | Mar 24, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power supply with a capacitor providing an output voltage. A switch is connected between a voltage source and the capacitor. A control terminal of the switch has a switching threshold. The switch conducts a charging current from the voltage source into the capacitor. A control circuit controls the switch on when the voltage source is below a predetermined level and off when the voltage source is above the level. A control voltage supply circuit provides a control supply voltage. A control terminal voltage for the switch derived from the control supply voltage with a magnitude in excess of the switching threshold drives the switch on in a saturated region of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.